Do calories really matter?

Calories. If you eat more in a day then you burn off, you'll gain weight? I don't think that's true, I lost like 50 pounds this summer. As long as you exercise and don't overeat, and eat too many fatty foods, you should be okay right?

no way caories actually give you energy unless you eat way to many calories they will definately make you gain weight

yes you should be ok, if you maintain a stable diet, exercise daily, and moderate the unhealthy foods, you should be able to keep a healthy lifestyle

depends on your metabolism which is your body ability to burn calories

I can burn about 150-200 calories in half an hour of more, I'll update-by playing Dance Dance Revolution.

Calories from food are changed to glucose by your body for energy. If you don't burn it up fairly quickly it is converted into glycogen, which is kind of like stand by energy. If glycogen isn't used for a while it is converted to fat. So yes any extra calories you don't burn off will eventually become fat.